/*
表达式
*/
fn main() {
    let x = 5u32;

    let y = {
        let x_squared = x * x;
        let x_cube = x_squared * x;
        x_cube + x_squared + x
    };
    let z = { 2 * x };

    println!("{}", x);
    println!("{:?}", y);
    println!("{:?}", z);
}
